1// -*- C++ -*-
  2#include "Rivet/Analysis.hh"
  3#include "Rivet/Projections/FinalState.hh"
  4#include "Rivet/Projections/UnstableParticles.hh"
  5
  6namespace Rivet {
  7
  8
  9  /// @brief Add a short analysis description here
 10  class BELLE_2016_I1389855 : public Analysis {
 11  public:
 12
 13    /// Constructor
 14    RIVET_DEFAULT_ANALYSIS_CTOR(BELLE_2016_I1389855);
 15
 16
 17    /// @name Analysis methods
 18    //@{
 19
 20    /// Book histograms and initialise projections before the run
 21    void init() {
 22      declare(FinalState(), "FS");
 23      declare(UnstableParticles(), "UFS");
 24      book(_nhb1, "TMP/hb1");
 25      book(_nhb2, "TMP/hb2");
 26    }
 27
 28    void findChildren(const Particle & p,map<long,int> & nRes, int &ncount) {
 29      for (const Particle &child : p.children()) {
 30	if(child.children().empty()) {
 31	  --nRes[child.pid()];
 32	  --ncount;
 33	}
 34	else
 35	  findChildren(child,nRes,ncount);
 36      }
 37    }
 38
 39    /// Perform the per-event analysis
 40    void analyze(const Event& event) {
 41
 42      const FinalState& fs = apply<FinalState>(event, "FS");
 43      map<long,int> nCount;
 44      int ntotal(0);
 45      for (const Particle& p : fs.particles()) {
 46	nCount[p.pid()] += 1;
 47	++ntotal;
 48      }
 49      const FinalState& ufs = apply<FinalState>(event, "UFS");
 50      for (const Particle& p : ufs.particles()) {
 51	if(p.children().empty()) continue;
 52	// find the omega
 53	if(p.pid()== 10553|| p.pid()==110553) {
 54	  map<long,int> nRes = nCount;
 55	  int ncount = ntotal;
 56	  findChildren(p,nRes,ncount);
 57	  // omega pi+pi-
 58	  if(ncount!=2) continue;
 59	  bool matched = true;
 60	  for(auto const & val : nRes) {
 61	    if(abs(val.first)==211) {
 62	      if(val.second !=1) {
 63		matched = false;
 64		break;
 65	      }
 66	    }
 67	    else if(val.second!=0) {
 68	      matched = false;
 69	      break;
 70	    }
 71	  }
 72	  if(matched) {
 73	    if(p.pid()== 10553)
 74	      _nhb1->fill();
 75	    else
 76	      _nhb2->fill();
 77	    break;
 78	  }
 79	}
 80      }
 81    }
 82
 83
 84    /// Normalise histograms etc., after the run
 85    void finalize() {
 86      for(unsigned int ix=3;ix<5;++ix) {
 87	double sigma,error;
 88	if(ix==3) {
 89	  sigma = _nhb1->val();
 90	  error = _nhb1->err();
 91	}
 92	else {
 93	  sigma = _nhb2->val();
 94	  error = _nhb2->err();
 95	}
 96	sigma *= crossSection()/ sumOfWeights() /picobarn;
 97	error *= crossSection()/ sumOfWeights() /picobarn; 
 98	Scatter2D temphisto(refData(1, 1, ix));
 99	Scatter2DPtr  mult;
100        book(mult, 1, 1, ix);
101	for (size_t b = 0; b < temphisto.numPoints(); b++) {
102	  const double x  = temphisto.point(b).x();
103	  pair<double,double> ex = temphisto.point(b).xErrs();
104	  pair<double,double> ex2 = ex;
105	  if(ex2.first ==0.) ex2. first=0.0001;
106	  if(ex2.second==0.) ex2.second=0.0001;
107	  if (inRange(sqrtS()/MeV, x-ex2.first, x+ex2.second)) {
108	    mult->addPoint(x, sigma, ex, make_pair(error,error));
109	  }
110	  else {
111	    mult->addPoint(x, 0., ex, make_pair(0.,.0));
112	  }
113	}
114      }
115    }
116    //@}
117
118
119    /// @name Histograms
120    //@{
121    CounterPtr _nhb1,_nhb2;
122    //@}
123
124
125  };
126
127
128  // The hook for the plugin system
129  RIVET_DECLARE_PLUGIN(BELLE_2016_I1389855);
130
131
132}